Origin XY on CIR1, rotate X CIR1 to CIR2
ASSIGN/ANGLE1=ATAN((CIR1.R-CIR2.R)/CIR2.X
ASSIGN/PT_1=CIR2.R*MPOINT(-SIN(ANGLE),COS(ANGLE),0)
ASSIGN/V_1=MPOINT(COS(ANGLE),SIN(ANGLE),0)
Origin XY on CIR1, rotate X CIR1 to CIR2
ASSIGN/ANGLE1=ATAN((CIR1.R-CIR2.R)/CIR2.X
ASSIGN/PT_1=CIR2.R*MPOINT(-SIN(ANGLE),COS(ANGLE),0)
ASSIGN/V_1=MPOINT(COS(ANGLE),SIN(ANGLE),0)
Thank you very much for your explanation. so tangent line can achieve by calculation,
when I Was using software verisurf, the software itself did it automatically and also asked about internal tangent and external tangent .line.
hopefully the next version of PC-DMIS include this command
